1. SCIENCE Center Grove Middle School North
MEASUREMENT
SCIENCE
Center Grove Middle School North

2. Earliest System Of Measurements & Weights

3. Genesis 6:15 " The length of the Ark shall be three hundred cubits, the breadth of it fifty cubits, and the height of it thirty cubits."
Span
Foot

4. Bronze Age 3000 BC- 2500BC, people of Indus Valley , Egypt and Mesopotamia.

5. Indus Valley

6. Why do we need a uniform system of measurement?

7. Timeline of countries that changed over to
the SI units of measurement.
Identify the three countries that have not changed to this system.
USA, Liberia, & Burma

8. Measurement Describe the world using numbers
Types of Measurement include:
Distance, time, speed, volume, mass…
Measurement can also help describe events

9. Metric System Called the International System of Units or SI
Decimal system based on 10’s
Prefixes include:
Milli (1/1000th)
Deci (1/10th)
Kilo (1000)

10. Metric System
Used by scientists all over the world to measure length, volume, mass, weight, density, and temperature.
King Hector Doesn’t Usually Drink Chocolate Milk
KILO
HECTO
DEKA
UNIT
DECI
CENTI
MILLI

11. Precision and Accuracy
Precision is the closeness of repeated measurements to each other.
Accuracy is the closeness of a measured or derived data value to its true value. precise = repeatable
accurate = true
Discovery Video Clip

12. Precision and Accuracy
Significant digits are necessary when calculating
DON’T COUNT Zeros at the end of the number without a decimal (ex. 1300) OR Zeros at the beginning of a decimal (ex ). Video Clip
When adding or subtracting, use the smallest number of decimal places.
Example:
+ 3.1
7.687
Decimal places = 3
Decimal places = 1
Answer in significant digits = 7.7

13. Precision and Accuracy
Scientific notation is used so large numbers are easier to understand.
Move the decimal point until only 1 nonzero number remains on the left. Count the number of places you moved the decimal and use that number as a power of ten
Examples:
= x 1010
= 4.5 x 10-7
43289 = x 104

14. Length Distance from one point to another METER (M) is the basic unit
1M = 100cm
1M = 1000mm
1km = 1000M

15. Volume Amount of space an object takes up
Liter (L) is the basic unit of LIQUID volume
Cubic centimeter (cm3) is the basic unit of SOLID volume

16. Mass
Amount of matter in an object
Gram (g) is the basic unit

17. Weight Amount of attraction between two objects due to gravity
Newton (N) is the basic unit
MASS AND WEIGHT ARE NOT THE SAME!

18. Density Mass per unit volume of a substance g/mL is the basic unit
Formula: Density = Mass divided by Volume
Density = g/mL
Density of water is 1gram/milliliter
If an object’s density is less then one it will float.
If an object’s density is greater then one it will sink.

19. Temperature Measure of hotness and coldness
Celsius (C°) is the basic unit
Water freezes at 0° degree Celsius and boils at 100° degrees Celsius.